Adjust screen transitions (#8707)

* Fade transition between main navigation tabs
* Shared axis X between screen stacks

Activity transition is using a "close enough" shared axis X xml animation

app/src/main/java/eu/kanade/tachiyomi/ui/webview/WebViewActivity.kt

@@ -30,6 +30,7 @@ class WebViewActivity : BaseActivity() {
     }
 
     override fun onCreate(savedInstanceState: Bundle?) {
+        overridePendingTransition(R.anim.shared_axis_x_push_enter, R.anim.shared_axis_x_push_exit)
         super.onCreate(savedInstanceState)
 
         if (!WebViewUtil.supportsWebView(this)) {
@@ -58,6 +59,11 @@ class WebViewActivity : BaseActivity() {
         }
     }
 
+    override fun finish() {
+        super.finish()
+        overridePendingTransition(R.anim.shared_axis_x_pop_enter, R.anim.shared_axis_x_pop_exit)
+    }
+
     private fun shareWebpage(url: String) {
         try {
             startActivity(url.toUri().toShareIntent(this, type = "text/plain"))